Effect of filtration temperature on organic sulfur removal from coal by perchloroethylene coal cleaning process

TLDR: In this paper, it has been established that the time required for separation and isother the reaction mixture is left too long in the extraction environment, the intermediate labile sulfur released by the reaction forms cross-links with the organic matter in the macromolecule of coal This is detrimental to the process efficiency.

Abstract: The perchloroethylene extraction desulfurization process removes the organic sulfur in coal via a hybrid mechanism of solvent extraction and chemical reaction The nature and extent of the reaction is controlled by the extraction time and temperature of operation Although the extraction temperature is kept identical for all types of coals (120°C), the organosulfur extraction time still depends upon the type of coal If the reaction mixture is left too long in the extraction environment, the intermediate labile sulfur released by the reaction forms cross-links with the organic matter in the macromolecule of coal This is detrimental to the process efficiency Constant temperature has to be maintained throughout the extraction, till coal is separated from the solvent If not, the extracted labile sulfur re-enters the coal macromolecule to form inter-penetrating polymer networks with the organic matter in coal In this paper, it has been established that the time required for separation and isother